package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
  @Resource
  private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //符合，生成验证码
        String code = RandomUtil.randomNumbers(6);

        //保存验证码到Redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code,LOGIN_CODE_TTL, TimeUnit.MINUTES);

        //发送验证码
        log.debug("发送短信验证码成功，验证码：{}", code);

        return Result.ok();
    }

    @Override
    public Result phoneLoginOrRegister(LoginFormDTO loginForm, HttpSession session) {
        //校验手机号
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())) {
            return Result.fail("手机号格式错误");
        }
        //校验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + loginForm.getPhone());
        String code = loginForm.getCode();
        if(!cacheCode.equals(code) || StringUtils.isEmpty(code)){
            return Result.fail("验证码错误");
        }
        //检查用户存不存在
        String phone = loginForm.getPhone();
        User user = query().eq("phone", phone).one();
        if(user == null){
            user = createUserWithPhone(phone);
        }
        //保存用户到redis中
        //1.生成token,作为登录令牌
       String token = UUID.randomUUID().toString().replace("-", "");
        //2.将对象用hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> stringObjectMap = BeanUtil.beanToMap(userDTO,new HashMap<>()
                , CopyOptions.create()
                        .setIgnoreNullValue( true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));//自定义key值
        //3.保存
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY + token, stringObjectMap);
        //4.设置token有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY + token, LOGIN_USER_TTL, TimeUnit.MINUTES);

        return  Result.ok(token);
    }

    private User createUserWithPhone(String  phone) {
        //创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        //保存用户
        save(user);
        return user;
    }
}
